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CVE-2019-25652

UniFi Network Controller Improper Certificate Validation Leading to Credential Theft via MITM

Published: Mar 27, 2026Updated: Mar 30, 2026 Sources: CVE List NVDCWE-295
NVD MITRE
7.5CVSSHIGH
EPSS Score
0.1%
Top 98.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

Description

UniFi Network Controller before version 5.10.22 and 5.11.x before 5.11.18 contains an improper certificate verification vulnerability that allows adjacent network attackers to conduct man-in-the-middle attacks by presenting a false SSL certificate during SMTP connections. Attackers can intercept SMTP traffic and obtain credentials by exploiting the insecure SSL host verification mechanism in the SMTP certificate validation process.

CVSS Vector Breakdown

AV:AAC:HPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:AAttack Vector
Adjacent
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-295

Affected Products

UniFi Network ControllerUbiquiti
Embedded
Networking Infrastructure / router-switch
ubiquiticommercialNetworking Infrastructureaka edgerouter x, unifi network application, unifi ios app

Attack Graph

Products CVE Techniques Tactics

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Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

https://community.ui.com/releases/Security-Advisory-Bulletin-003-003/982bbaa8-2a07-4f81-a5f6-0bb84753f391
community.ui.com
https://www.vulncheck.com/advisories/unifi-network-controller-improper-certificate-validation-leading-to-credential-theft-via-mitm
vulncheck.com

Timeline

Published
Mar 27, 2026
Last Updated
Mar 30, 2026

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